Flint Glass
a species of glass made of white sand, 52; carbonate of potash, 14; oxide of lead, 33; alumina, 1; with metallic additions to neutralize color.
Pure white sand free from oxide of iron is required for flint glass, as iron imparts a green color. The articles are of white sand, 52; carbonate of potash, ponty, the mold and press, and frequently is required for flint glass, as iron iming. The silica for its manufacture was formerly derived from pulverized flints, and hence its name. lead gives it a peculiar property of refracting light, which causes it to be used The presence of for lenses. Flint glass fuses at a lower temperature than ordinary glass, such as crown, plate, or window glass. Flint glass is softer than some other varieties, and is the kind which is cut. It is much fracting light, which causes it to be used lead gives it a peculiar property of re- and hence its name. The presence of for lenses. Flint glass fuses at a lower and fittings. a term used for any implements of flint obtained from Pleistocene or more recent deposits, each being afterward named more specifically as its exact nature be- FLINT IMPLEMENTS, comes understood. Evans divides the implements into three classes - spear term used for any implements of flint various articles of decorative furniture FLINT IMPLEMENTS, a generic i 1 FLINTSHIRE ments, and flint flakes. Such relics of is by far the most calamitous defeat early man had been found with the bones of an elephant, in 1715, in the gravel of London, England. Similar remains were exhumed at Hoxne, near Diss, in 1797, by John Frere. About 1833 or 1834, the Rev. Mr. McEnery, a Roman Catholic priest, discovered similar ones in Kent's Hole, Torquay, in Devon, England. From about 1841, M. Boucher de Perthes, of Abbeville, collected flint implements from the valley of the Somme, in France, publishing the result in his "Celtic Antiquities," in 1847.
Many flint implements have been found in the S. and E. of England, in Bedfordshire, in Suffolk, Hampshire, Wiltshire, and in the N. and N. E. of London, in Essex, in Buckinghamshire, etc. The oldest ones are palæolithic, and are unpolished; the newer neolithic, and are polished. The implements from the Somme are of the former kind, and are the oldest known. According to Prof.
Boyd Dawkins, the river-drift man inhabiting the valleys of the Somme, the Thames, etc., was older than the cave man of Brixham, Kent's Hole, and other caverns. The former lived in the middle part of the Pleistocene (Lyell's Upper Pliocene) period and inhabited Palestine, India, and this country as well as Europe.